From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Mugunthan V N <mugunthanvnm@ti.com>
Cc: Lee Jones <lee.jones@linaro.org>,
linux-input@vger.kernel.org, Jonathan Cameron <jic23@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Sekhar Nori <nsekhar@ti.com>,
Vignesh R <vigneshr@ti.com>,
devicetree@vger.kernel.org, linux-omap@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix ti,charge-delay to represent in nS
Date: Tue, 29 Nov 2016 13:09:49 -0800 [thread overview]
Message-ID: <20161129210949.GB20680@dtor-ws> (raw)
In-Reply-To: <8b97b7e6-1ea4-bf13-7da5-55135a994231@ti.com>
On Tue, Nov 29, 2016 at 11:11:35AM +0530, Mugunthan V N wrote:
> On Friday 25 November 2016 03:29 PM, Lee Jones wrote:
> > On Fri, 25 Nov 2016, Mugunthan V N wrote:
> >
> >> Hi Dmitry Torokhov,
> >>
> >> On Thursday 10 November 2016 10:05 PM, Mugunthan V N wrote:
> >>> This patch series enables ADC to be clocked at 24MHz as the
> >>> TI AM335x ADC driver has already adopted to use DMA to transfer
> >>> ADC samples. Now ADC can generated upto 800K Samples per second
> >>> with the patch [1] on AM335x BBB and AM437x GP EVM.
> >>>
> >>> when ADC ref clock is set at 24MHz, I am seeing some issue with
> >>> touch screen pointer as the pointer jumps to random locations
> >>> with free draw application. The issue is due to increase in ADC
> >>> clock and charge delay for the touchscreen ADC line duration
> >>> reduced.
> >>>
> >>> So the notation of ti,charge-delay in terms of ADC clock is
> >>> wrong, it has to be represented in time and driver has to convert
> >>> the charge delay time to ADC clocks based on what ADC clock
> >>> frequency is set.
> >>>
> >>> Measured the performance with the iio_generic_buffer with the
> >>> patch [2] applied
> >>>
> >>> Verified the touch screen on AM335x GP EVM and AM335x BBB LCD7
> >>> cape with [3] dts for display and touch screen to work.
> >>>
> >>
> >> Since there are acks from DT and MFD maintainers, can you pull the patch
> >> series if you do not have any more comments.
> >
> > Cant do anything without *all* Acks.
> >
> Hi Dmitry Torokhov,
>
> Can you provide your inputs on the patch series.
You have my ack for the input bit.
--
Dmitry
next prev parent reply other threads:[~2016-11-29 21:09 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-10 16:35 [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix ti,charge-delay to represent in nS Mugunthan V N
2016-11-10 16:35 ` Mugunthan V N
[not found] ` <20161110163515.27598-1-mugunthanvnm-l0cyMroinI0@public.gmane.org>
2016-11-10 16:35 ` [PATCH v2 1/3] dt/binding: ti-tsc-adc: deprecate ti,charge-delay and add binding doc for ti,charge-delay-ns Mugunthan V N
2016-11-10 16:35 ` Mugunthan V N
2016-11-15 1:54 ` Rob Herring
2016-11-11 7:58 ` [PATCH v2 2/3] Input: ti_am335x_tsc: Add support " Mugunthan V N
2016-11-11 7:58 ` Mugunthan V N
[not found] ` <20161111075819.5760-1-mugunthanvnm-l0cyMroinI0@public.gmane.org>
2016-11-29 21:09 ` Dmitry Torokhov
2016-11-29 21:09 ` Dmitry Torokhov
2016-11-11 7:58 ` [PATCH v2 3/3] drivers: mfd: ti_am335x_tscadc: increase ADC ref clock to 24MHz Mugunthan V N
2016-11-11 7:58 ` Mugunthan V N
[not found] ` <20161111075838.5815-1-mugunthanvnm-l0cyMroinI0@public.gmane.org>
2016-11-22 13:04 ` Lee Jones
2016-11-22 13:04 ` Lee Jones
2016-11-25 4:57 ` [PATCH v2 0/3] increase TSCADC clock to 24MHz and fix ti,charge-delay to represent in nS Mugunthan V N
2016-11-25 4:57 ` Mugunthan V N
2016-11-25 9:59 ` Lee Jones
[not found] ` <20161125095918.GZ10134-Re9dqnLqz4GzQB+pC5nmwQ@public.gmane.org>
2016-11-29 5:41 ` Mugunthan V N
2016-11-29 5:41 ` Mugunthan V N
2016-11-29 21:09 ` Dmitry Torokhov [this message]
2016-12-05 3:54 ` Mugunthan V N
2016-12-05 3:54 ` Mugunthan V N
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